Blood vessel puncture device and blood vessel puncture system

Abstract

To provide a blood vessel puncture device equipped with a light source unit that can be attached to and detached from a fitting part of a blood circulation block part.SOLUTION: A blood vessel puncture device 12 of a blood vessel puncture system includes a blood circulation block part 20, a light source unit 22, and a light path 26. The light L1 emitted from a light source part 66 is derived from the tip of a linear part 24 to the outside. At least either a needle hub 40 or the blood circulation block part is provided with a blood inflow part 62 for checking flashback to which the blood flowing from a tip opening 46 of a needle body 38 is guided. The blood circulation block part is formed so as to block circulation of blood to a fitting part 64.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present invention relates to a vascular puncture device and a vascular puncture system. [Background technology]

[0002] For example, Patent Document 1 discloses a blood vessel puncture device equipped with a linear portion (needle body and catheter shaft) capable of puncturing a blood vessel in a living body. The blood vessel puncture device comprises a needle hub provided at the base end of the needle body, and a light source unit detachably provided at the base end of the needle hub. With the light source unit attached to the base end of the needle hub, the base end of the needle body is connected to the light source unit. A blocking member is provided in the lumen of the needle body to prevent blood from flowing into the light source unit. Light emitted by the light source portion of the light source unit passes through the blocking member and is emitted from the tip opening of the needle body.

[0003] In such a blood vessel puncture device, the light emitted from the tip opening of the needle body is absorbed or attenuated by the blood, so the intensity of the light received or visible outside the living body changes before and after the needle body secures the blood vessel. Therefore, it is possible to easily and quickly determine whether the needle body has secured the blood vessel based on the light emitted by the light source unit. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] International Publication No. 2022 / 176880 Summary of the Invention [Problem to be solved by the invention]

[0005] Incidentally, when inserting a linear portion into a thick blood vessel or a blood vessel close to the skin, it may be possible to easily determine whether the linear portion of the blood vessel is secured without relying on the light emitted by the light source unit. If the light source unit is detachable from the needle hub as in Patent Document 1, it is convenient to be able to select whether or not to use the light source unit depending on the situation. Furthermore, the light source unit, which is relatively expensive, can be reused, thereby reducing the cost of the device used to perform the blood vessel puncture procedure.

[0006] On the other hand, in the above-mentioned Patent Document 1, the lumen of the needle body is blocked by a blocking member. That is, the needle hub does not have a blood inlet portion (a blood inlet portion for checking flashback) for confirming that the needle body is in a blood vessel. When a needle hub having a blood inlet portion for checking flashback is used, there is a problem that blood flowing into the blood inlet portion may come into contact with the light source unit, and a light source unit that has come into contact with blood cannot be reused.

[0007] The present invention aims to solve the above-mentioned problems. [Means for solving the problem]

[0008] (1) One aspect of the present invention is a blood vessel puncture device comprising a linear portion capable of puncturing a blood vessel at a living body site, the linear portion including a tubular needle body, and a needle hub provided at a proximal end of the needle body, a light source unit having a light source that emits light and that is detachable from an attachment portion of the blood circulation blocking portion; and an optical path that guides the light emitted by the light source to a tip end of the linear portion, wherein the light emitted by the light source is guided to the outside from the tip end of the linear portion, and at least one of the needle hub and the blood circulation blocking portion is provided with a blood inlet portion for checking flashback, into which blood that has flowed in from the tip opening of the needle body is guided, and the blood circulation blocking portion is formed so as to prevent the blood in the blood inlet portion from flowing to the attachment portion.

[0009] (2) In the blood vessel puncture device according to item (1), when the light source unit is attached to the attachment portion, the light source portion emits the light toward the tip of the linear portion.

[0010] (3) In the blood vessel puncture device according to item (1) or (2), the light source unit has a housing that houses the light source section, and the housing has a connecting section that is detachable from the mounting section.

[0011] (4) In the blood vessel puncture device according to any one of items (1) to (3), the blood flow blocking part is fixed to the base end part of the needle hub.

[0012] (5) The blood vessel puncture device according to any one of items (1) to (3), wherein the blood flow blocking part is detachable from the base end part of the needle hub.

[0013] (6) The blood vessel puncture device according to any one of items (1) to (5), wherein the light emitted by the light source unit is guided through the lumen of the needle body and out of the tip opening of the needle body.

[0014] (7) In the blood vessel puncture device according to item (6), a reflecting portion that reflects the light emitted by the light source portion is provided on the inner surface of the needle body.

[0015] (8) In the blood vessel puncture device according to item (6), the optical path includes a light guiding member for guiding the light emitted by the light source unit to the tip of the needle body.

[0016] (9) In the blood vessel puncture device according to item (8), the tip of the light-guiding member is positioned at the tip of the needle body when inserted into the lumen of the needle body.

[0017] (10) In the blood vessel puncture device according to item (8) or (9), the proximal end of the light guiding member is supported by the blood flow blocking portion.

[0018] (11) A blood vessel puncture device according to item (10), wherein the blood flow blocking section is detachable from the base end of the needle hub, and the inner surface of the needle hub is provided with a guide surface for guiding the light guiding member into the inner cavity of the needle body when the blood flow blocking section is attached to the base end of the needle hub, and the guide surface tapers in diameter toward the needle body.

[0019] (12) A vascular puncture device according to any one of items (1) to (11), wherein the blood flow blocking section comprises a filter that blocks the flow of blood from the blood inlet section to the attachment section, and a support section that supports the filter, and the attachment section is provided at the base end of the support section.

[0020] (13) The blood vessel puncture device according to any one of items (1) to (12), wherein the light source emits the light including near-infrared light.

[0021] (14) A vascular puncture device according to any one of items (1) to (13), comprising: a tubular catheter shaft having a lumen through which the needle body is inserted; and a catheter hub provided at the base end of the catheter shaft and having a lumen through which the needle body is inserted, wherein the linear portion includes the needle body and the catheter shaft.

[0022] (15) A vascular puncture device according to item (14), wherein the optical path is provided in the wall of the blood flow blocking portion, the wall of the needle hub, the wall of the catheter hub, and the wall of the catheter shaft, and the light emitted by the light source is guided to the outside from the tip of the catheter shaft.

[0023] (16) A vascular puncture device according to item (15), wherein the outer peripheral surfaces of the wall of the blood flow blocking portion, the wall of the needle hub, the wall of the catheter hub, and the wall of the catheter shaft are provided with a light transmission suppression portion that suppresses the transmission of the light emitted by the light source portion.

[0024] (17) Another aspect of the present invention is a blood vessel puncture system comprising a blood vessel puncture device according to any one of items (1) to (16), a light receiving unit that receives the light guided from the tip of the linear portion, and an image display unit that displays a light receiving image created based on the light received by the light receiving unit. [Effects of the Invention]

[0025] According to the present invention, the light source unit is detachable from the attachment portion of the blood flow blocking portion, allowing the user to select whether or not to use the light source unit depending on the situation. Furthermore, when the light source unit is used, light emitted by the light source unit is guided to the tip of the linear portion via an optical path. Before the linear portion secures a blood vessel, the light emitted from the tip of the linear portion passes through biological tissue (e.g., subcutaneous tissue other than blood vessels) and is guided to the outside of the biological site. On the other hand, when the linear portion secures a blood vessel, the light emitted from the tip of the linear portion is absorbed by blood or attenuated as it passes through blood. In other words, the intensity of light received or visible outside the biological site changes before and after the linear portion secures a blood vessel, allowing the user to easily and quickly determine whether the linear portion secures a blood vessel based on the light emitted by the light source unit.

[0026] Furthermore, since blood flows into the blood inlet portion when the needle body secures the blood vessel, the user can accurately know whether the needle body has secured the blood vessel by visually checking the blood flow into the blood inlet portion. At this time, the blood flow from the blood inlet portion to the attachment portion is blocked by the blood flow blocking portion. Therefore, the light source unit attached to the attachment portion does not come into contact with blood. Therefore, the light source unit can be reused. [Brief explanation of the drawings]

[0027] [Figure 1] FIG. 1 is a schematic diagram of a blood vessel puncture system according to one embodiment of the present invention. [Figure 2] 2 is an exploded perspective view of the vascular puncture device of FIG. 1. FIG. [Figure 3] 3 is a longitudinal cross-sectional view of the vascular puncture device of FIG. 2. FIG. [Figure 4]FIG. 4 is a first explanatory view of a procedure for puncturing a blood vessel with the blood vessel puncture device of FIG. [Figure 5] FIG. 5 is a second explanatory view of the puncture procedure. [Figure 6] FIG. 6 is an explanatory diagram showing a received light image in the state of FIG. [Figure 7] FIG. 7 is a third explanatory view of the puncture procedure. [Figure 8] FIG. 8 is an explanatory diagram showing a received light image in the state of FIG. [Figure 9] FIG. 9 is a fourth explanatory view of the puncture procedure. [Figure 10] FIG. 10 is a fifth explanatory view of the puncture procedure. [Figure 11] Fig. 11A is a partially omitted longitudinal sectional view of a blood vessel puncture device including a light source unit according to configuration example 1. Fig. 11B is an explanatory view of the state in which the light source unit shown in Fig. 11A is attached to an attachment part. [Figure 12] FIG. 12 is a longitudinal cross-sectional view, with a portion omitted, of a blood vessel puncture device equipped with a light source unit according to the second configuration example. [Figure 13] FIG. 13 is a longitudinal sectional view of a blood vessel puncture device according to a first modified example. [Figure 14] Figure 14A is a first explanatory view of a procedure for using the blood vessel puncture device of Figure 13. Figure 14B is a second explanatory view of the procedure for using the device. [Figure 15] Figure 15A is a third explanatory diagram of the usage procedure, and Figure 15B is a fourth explanatory diagram of the usage procedure. [Figure 16] FIG. 16 is a longitudinal sectional view of a blood vessel puncture device according to a second modified example. [Figure 17] FIG. 17 is an explanatory diagram showing a received light image of the blood vessel puncture device of FIG. 16 in a state before the blood vessel is secured. [Figure 18] FIG. 18 is a cross-sectional view illustrating a blood flow blocking portion according to a configuration example. [Figure 19] FIG. 19 is a longitudinal sectional view of a blood vessel puncture device according to a third modified example. [Figure 20] FIG. 20 is a longitudinal sectional view of a blood vessel puncture device according to a fourth modified example. DETAILED DESCRIPTION OF THE INVENTION

[0028] As shown in FIG. 1, a vascular puncture system 10 according to one embodiment of the present invention includes a vascular puncture device 12 and a visualization device 14. The vascular puncture device 12 is configured as an indwelling needle (such as a peripheral arterial or venous indwelling needle or a dialysis indwelling needle) for administering an infusion (medicinal solution) into a blood vessel 302 of a living body part 300 (see FIG. 7). However, the vascular puncture device 12 may also be a vascular access product such as a peripherally inserted central venous catheter (PICC), a midline catheter, or a central venous catheter. The vascular puncture device 12 may also be a blood collection needle without a catheter.

[0029] 1 to 3, the blood vessel puncture device 12 includes a catheter member 16, a needle member 18, a blood flow blocking unit 20, and a light source unit 22. The catheter member 16, the needle member 18, and the blood flow blocking unit 20 are disposable items that are discarded after a single use. The light source unit 22 is a reusable item that can be used multiple times.

[0030] In its initial state, the blood vessel puncturing device 12 has a linear portion 24 that can puncture a blood vessel 302 in a biological site 300. In Figure 3, the linear portion 24 is formed by inserting the tubular needle body 38 of the needle member 18 into the lumen 32 of the tubular catheter shaft 28 of the catheter member 16. In other words, the linear portion 24 has a double-tube structure. The blood vessel puncturing device 12 has an optical path 26 that guides light L1 emitted by a light source 66 of the light source unit 22 located at the proximal end of the blood vessel puncturing device 12 to the distal end of the linear portion 24.

[0031] 2 and 3, the catheter member 16 has a flexible catheter shaft 28 and a catheter hub 30 provided at the proximal end of the catheter shaft 28. The catheter shaft 28 is a tubular member that can be continuously inserted into a blood vessel 302 at a biological site 300. The catheter shaft 28 has an inner lumen 32 (medicinal solution supply path) that extends axially over its entire length. A distal end opening 34 that communicates with the inner lumen 32 is formed at the distal end of the catheter shaft 28.

[0032] Examples of materials that can be used to form the catheter shaft 28 include fluororesins such as polytetrafluoroethylene (PTFE), ethylene-tetrafluoroethylene copolymer (ETFE), and perfluoroalkoxy fluororesin (PFA); olefin resins such as polyethylene and polypropylene; and mixtures of these; polyurethane; polyester; polyamide; polyether nylon resin; and mixtures of olefin resins and ethylene-vinyl acetate copolymers.

[0033] The wall of the catheter shaft 28 forms part of the optical path 26. The wall of the catheter shaft 28 guides the light L1 emitted by the light source unit 66 from the proximal end of the catheter shaft 28 to the distal end 35. At least the portion of the catheter shaft 28 that forms the optical path 26 is transparent so that the light L1 emitted by the light source unit 66 can pass through.

[0034] The entire catheter shaft 28 may be transparent. The material of at least the portion of the catheter shaft 28 that forms the optical path 26 may include, for example, methacrylic resin. The portion of the catheter shaft 28 that forms the optical path 26 may be hollow.

[0035] In Figure 3, the catheter hub 30 is hollow (cylindrical). The proximal end of the catheter shaft 28 is fixed to the distal end of the catheter hub 30. The catheter hub 30 is preferably made of a material harder than the catheter shaft 28. The material of the catheter hub 30 is not particularly limited, but suitable materials include thermoplastic resins such as polypropylene, polycarbonate, polyamide, polysulfone, polyarylate, methacrylate-butylene-styrene copolymer, polyurethane, acrylic resin, and ABS resin. A hemostatic valve (not shown) is provided in the lumen 36 of the catheter hub 30.

[0036] The wall of the catheter hub 30 forms part of the optical path 26. The wall of the catheter hub 30 guides the light L1 emitted by the light source unit 66 from the proximal end to the distal end of the catheter hub 30. At least the portion of the catheter hub 30 that forms the optical path 26 is transparent so that the light L1 emitted by the light source unit 66 can pass through. The entire catheter hub 30 may be transparent.

[0037] The constituent material of at least the portion of the catheter hub 30 that forms the optical path 26 may include, for example, methacrylic resin. The portion of the catheter hub 30 that forms the optical path 26 may be hollow. A light-guiding member (e.g., an optical fiber, an acrylic member, a glass member, a light-emitting tube, etc.) that forms the optical path 26 may be embedded in the wall of the catheter hub 30. In this case, the light-guiding member may be provided continuously from the proximal end to the distal end of the catheter hub 30, or may be provided discontinuously.

[0038] As shown in Figures 2 and 3, the needle member 18 includes a needle body 38 and a needle hub 40 provided at the proximal end of the needle body 38. The needle body 38 is a tubular member having sufficient rigidity to puncture a biological site 300 (see Figures 5 and 7). The needle body 38 is formed in a cylindrical shape. In Figure 3, the needle body 38 has a lumen 42 extending along the axial direction. The needle body 38 is inserted into the lumen 32 of the catheter shaft 28 and the lumen 36 of the catheter hub 30 when the blood vessel puncture device 12 is in the initial state (assembled state).

[0039] The needle body 38 is made of a metal material such as stainless steel, aluminum, an aluminum alloy, titanium, or a titanium alloy. The needle body 38 may also be made of a resin material such as polypropylene (PP), polycarbonate (PC), polyether ether ketone (PEEK), or liquid crystal polymer (LCP). The needle body 38 is formed to be sufficiently longer than the catheter shaft 28, and protrudes from the tip opening 34 of the catheter shaft 28 in the initial state of the vascular puncture device 12.

[0040] A blade surface 44 inclined relative to the axis of the needle body 38 is formed at the tip of the needle body 38. A tip opening 46 communicating with the lumen 42 of the needle body 38 is formed in the blade surface 44.

[0041] 3, the needle hub 40 is formed in a hollow (cylindrical) shape. A needle connection hole 48 into which the base end of the needle 38 is inserted is provided at the distal end of the needle hub 40. A first engagement portion 50 is provided at the proximal end of the needle hub 40. The first engagement portion 50 is a recess (hole) that opens into the proximal end surface of the needle hub 40.

[0042] The needle hub 40 has a lumen 52 that communicates with the lumen 42 of the needle body 38. Blood that has flowed through the lumen 42 of the needle body 38 flows into the lumen 52 of the needle hub 40. Examples of materials that can be used to construct the needle hub 40 include the same materials as those used to construct the catheter hub 30 described above.

[0043] The wall of the needle hub 40 forms part of the light path 26. The wall of the needle hub 40 guides the light L1 emitted by the light source 66 from the base end to the tip end of the needle hub 40. At least the part of the needle hub 40 that forms the light path 26 is transparent so that the light L1 emitted by the light source 66 can pass through. The entire needle hub 40 may be transparent.

[0044] The constituent material of at least the portion of the needle hub 40 that forms the light path 26 may include, for example, methacrylic resin. The portion of the needle hub 40 that forms the light path 26 may be hollow. A light-guiding member (e.g., an optical fiber, an acrylic member, a glass member, a light-emitting tube, etc.) that forms the light path 26 may be embedded in the wall of the needle hub 40. In this case, the light-guiding member may be provided continuously from the base end to the tip end of the needle hub 40, or may be provided discontinuously.

[0045] The blood flow blocking unit 20 has a support portion 54 and a filter 56 supported by the support portion 54. The support portion 54 is hollow. The support portion 54 supports the filter 56 arranged inside the support portion 54. A second engagement portion 58 that engages with the first engagement portion 50 is provided at the tip of the support portion 54. The second engagement portion 58 is a convex portion that fits into the first engagement portion 50, which is a concave portion. However, the first engagement portion 50 may be a convex portion and the second engagement portion 58 may be a concave portion. The support portion 54 is fixed to the needle hub 40. The support portion 54 may be integrally molded with the needle hub 40.

[0046] The support part 54 has a blood flow path 60 that communicates with the lumen 52 of the needle hub 40. Blood in the lumen 52 of the needle hub 40 flows through the blood flow path 60. The lumen 52 of the needle hub 40 and the blood flow path 60 form a blood inlet part 62 for checking flashback, into which blood that has flowed in from the tip opening 46 of the needle body 38 is guided. The blood flow path 60 extends along the axial direction of the needle body 38. The blood flow path 60 is located on an extension of the axis of the needle body 38.

[0047] A mounting portion 64 for mounting the light source unit 22 is provided on the support portion 54 in the proximal direction of the filter 56. The mounting portion 64 is a recess (hole) that opens in the proximal end surface of the support portion 54. The mounting portion 64 is located on the axis of the needle body 38.

[0048] The wall of the support part 54 forms part of the optical path 26. The wall of the support part 54 guides the light L1 emitted by the light source part 66 from the base end to the tip end of the support part 54. At least the part of the support part 54 that forms the optical path 26 is transparent so that the light L1 emitted by the light source part 66 can pass through. The entire support part 54 may be transparent.

[0049] The constituent material of at least the portion of the support part 54 that forms the optical path 26 may include, for example, methacrylic resin. The portion of the support part 54 that forms the optical path 26 may be hollow. A light-guiding member (e.g., an optical fiber, an acrylic member, a glass member, a light-emitting tube, etc.) that forms the optical path 26 may be embedded in the wall of the support part 54. In this case, the light-guiding member may be provided continuously from the base end to the tip end of the support part 54, or may be provided discontinuously.

[0050] The filter 56 is disposed so as to block the blood flow path 60 from the proximal direction. The filter 56 allows the flow of air while blocking the flow of blood. In other words, the filter 56 prevents blood flowing through the blood flow path 60 from flowing into the attachment portion 64. The filter 56 is preferably made of a material that transmits the light L1 emitted by the light source unit 66.

[0051] One or more air vent holes (not shown) are formed in the support part 54, closer to the proximal end than the filter 56, to allow blood to flow smoothly into the blood inlet part 62. Note that one or more air vent holes for discharging air from within the blood inlet part 62 to the outside may be provided in the needle hub 40. In this case, a filter 56 is provided in the air vent hole to prevent blood from flowing out.

[0052] The light source unit 22 is formed so as to be detachable from the mounting portion 64. When the needle body 38 is inserted into the blood vessel 302 with the light source unit 22 attached to the mounting portion 64, the surface of the light source unit 22 facing the living body is formed flat (having no convex portion). In this case, it is possible to prevent the light source unit 22 from coming into contact with the living body when the needle body 38 is inserted into the blood vessel 302.

[0053] The light source unit 22 has a light source section 66, a power supply section 68, and a housing 70. The light source section 66 is housed in the housing 70. As the light source section 66, for example, an LED, a lamp (e.g., a halogen lamp), a laser irradiation unit (e.g., a laser diode), or the like is used.

[0054] The light source unit 66 emits light L1 in a wavelength range that is easily absorbed by hemoglobin in blood and easily transmits through subcutaneous tissue. Specifically, the light source unit 66 emits at least one of visible light and near-infrared light. The wavelength of the visible light is preferably 600 nm or more and less than 700 nm. The wavelength of the near-infrared light is 700 nm or more and 2500 nm or less, preferably 700 nm or more and 1400 nm or less, and more preferably 780 nm or more and 940 nm or less.

[0055] The light L1 emitted by the light source unit 66 has a peak wavelength of 600 nm or more and 2500 nm or less. The light source unit 66 may simultaneously emit light L1 of multiple wavelengths. That is, the light source unit 66 may simultaneously emit, for example, visible light of 600 nm and near-infrared light of 850 nm. The light source unit 66 is capable of adjusting the brightness of the light L1. The light source unit 66 may be lit continuously or may flash.

[0056] The power supply unit 68 is provided in the housing 70. The power supply unit 68 supplies power to the light source unit 66. The power supply unit 68 includes, for example, a battery. Examples of the battery include a primary battery, a secondary battery, a solar cell, etc. The power supply unit 68 may include a wireless power supply device, or may include an attachment plug that can be connected to a wired outlet (socket). The power supply unit 68 is provided at the base end of the housing 70. The power supply unit 68 may be housed within the housing 70.

[0057] The housing 70 is formed, for example, in a cylindrical shape (e.g., a cylindrical shape). The housing 70 has a housing main body 74 in which an accommodating space 72 for the light source unit 66 is formed, and a connecting portion 76 that protrudes from the housing main body 74 and is detachably attachable to the attachment portion 64. To prevent the light L1 emitted by the light source unit 66 from leaking to the outside, a portion of the housing main body 74 is formed from a material that is opaque to the light L1. Alternatively, a portion (the outer peripheral surface or the inner peripheral surface) of the housing main body 74 is coated with a material that is opaque to the light L1.

[0058] The connecting portion 76 is a convex portion that can be fitted into the mounting portion 64, which is a concave portion. A light guide hole 78 that communicates with the accommodation space 72 is formed in the connecting portion 76. The light guide hole 78 opens at the tip surface of the connecting portion 76. The connecting portion 76 may be formed as a solid body. In this case, the connecting portion 76 has transparency so that the light L1 emitted by the light source unit 66 can pass through.

[0059] The connecting part 76 and the mounting part 64 preferably have smooth surfaces without any irregularities so that they can be easily wiped clean with alcohol. When the connecting part 76 is mounted on the mounting part 64, the light source part 66 is located on an extension of the axis of the needle body 38. When the connecting part 76 is mounted on the mounting part 64, the light source part 66 emits light L1 toward the tip of the needle body 38.

[0060] The attachment structure of blood circulation blocking section 20 and light source unit 22 may be such that attachment section 64 is a convex portion and connection section 76 is a concave portion (hole portion). Furthermore, the attachment structure is not limited to a fitting structure using convex and concave portions, and may be a claw engagement structure, a magnetic attraction structure, a hook-and-loop fastener engagement structure, a screw-threaded structure, or the like.

[0061] The vascular puncture device 12 has a light transmission suppression unit 80 for suppressing leakage of light L1 emitted by the light source unit 66 to the outside when the light L1 is guided to the tip of the catheter shaft 28. The light transmission suppression unit 80 is provided on the outer surfaces of the catheter shaft 28, the catheter hub 30, the needle hub 40, and the blood flow blocking unit 20.

[0062] The light transmission suppression unit 80 is provided from a position offset a predetermined length proximally from the tip of the catheter shaft 28 to the tip of the catheter hub 30. In other words, the light transmission suppression unit 80 is not provided at the tip portion 35 of the catheter shaft 28. That is, the light L1 emitted by the light source unit 66 is guided to the outside from the tip portion 35 of the catheter shaft 28. The tip portion 35 of the catheter shaft 28 may contain a fluorescent material that emits near-infrared light when irradiated with the light L1 emitted by the light source unit 66. Alternatively, the tip portion 35 of the catheter shaft 28 may contain a phosphorescent material that emits near-infrared light. The tip portion 35 of the catheter shaft 28 may be a film that can convert near-infrared light into visible light. In this case, only the tip portion 35 can emit light without causing the catheter hub 30 and the needle hub 40 to emit visible light, making the tip portion 35 easier to visualize.

[0063] The light transmission suppressing portion 80 is provided, for example, on the outer peripheral surfaces of the catheter hub 30, the needle hub 40, and the support portion 54. Note that the needle hub 40 and the support portion 54 have portions on their outer surfaces where the light transmission suppressing portion 80 is not provided, so that the blood inlet portion 62 can be seen from the outside.

[0064] The light transmission suppressing portion 80 is formed, for example, by painting a light-opaque material such as carbon black on the target surface. Alternatively, the light transmission suppressing portion 80 may be formed, for example, by vapor-depositing or coating a metal film on the target surface.

[0065] As shown in FIG. 1, the visualization device 14 includes an irradiation unit 82, a light receiving unit 84, and an image display unit 86. The irradiation unit 82 irradiates light L2 onto a biological site 300 (visualization target) punctured by the vascular puncture device 12. The irradiation unit 82 has an irradiation unit main body 88 that emits light L2. The irradiation unit main body 88 emits near-infrared light as light L2. The wavelength of the near-infrared light emitted by the irradiation unit main body 88 is not less than 700 nm and not more than 2500 nm, preferably not less than 700 nm and not more than 1400 nm, and more preferably not less than 780 nm and not more than 940 nm. The wavelengths of light L1 and light L2 may be the same or different.

[0066] The light receiving unit 84 is disposed on the opposite side of the biological part 300 from the irradiating unit 82. In other words, the irradiating unit 82 and the light receiving unit 84 are disposed so as to face each other with the biological part 300 in between. The light receiving unit 84 is a camera (image capturing unit) for receiving the light L1 emitted by the light source unit 66 and the light L2 emitted by the irradiating unit 82. For example, a CCD camera for near-infrared light is used as the light receiving unit 84. The light receiving unit 84 may also be a film capable of converting near-infrared light into visible light.

[0067] The image display unit 86 displays an image (received light image 90) created based on the light L1 and L2 received by the light receiving unit 84. The image display unit 86 may be goggles that can be worn or removed by a person, a fixed display, or a projector.

[0068] In the visualization device 14, the irradiating unit 82 may be arranged on the same side of the biological part 300 as the light receiving unit 84. In this case, the light receiving unit 84 receives light L2 emitted by the irradiating unit 82 that is reflected by the biological part 300 (reflected light). In addition, in the visualization device 14, the irradiating unit 82 may be arranged on both the opposite side of the biological part 300 from the light receiving unit 84 and the same side of the biological part 300 as the light receiving unit 84. In this case, of the light L2 emitted by each irradiating unit 82, both light that is transmitted through the biological part 300 (transmitted light) and light that is reflected by the biological part 300 (reflected light) are received by the light receiving unit 84.

[0069] Next, an example of a procedure for puncturing the blood vessel 302 with the blood vessel puncture device 12 will be described.

[0070] 3, in the initial state of the blood vessel puncture device 12, the blade surface 44 faces upward and protrudes distally from the distal opening 34 of the catheter shaft 28. The light source unit 22 is not attached to the blood flow blocking section 20. Here, the case where the light source section 66 emits light L1 that includes near-infrared light will be described.

[0071] First, the user determines the necessity of the light source unit 22 based on the patient's blood vessel 302 to be punctured. Specifically, if the user determines that the blood vessel 302 to be punctured is easy to grasp from the outside (it is easy to determine whether the blood vessel is secured) and the light source unit 22 is not necessary, the user performs the puncture operation of the linear portion 24 (needle body 38 and catheter shaft 28) into the blood vessel 302 without attaching the light source unit 22 to the blood circulation blocking portion 20.

[0072] On the other hand, if the user determines that the blood vessel 302 to be punctured is difficult to grasp from the outside (difficult to determine whether the blood vessel is secured) and therefore the light source unit 22 is necessary, the user attaches the connection portion 76 of the light source unit 22 to the attachment portion 64 of the blood flow prevention portion 20, as shown in Figure 4.

[0073] Next, the user sets up the visualization device 14. Specifically, as shown in Fig. 5, the irradiating unit 82 is placed below the biological part 300 (for example, the forearm of a human body), and the light receiving unit 84 is placed above the biological part 300. Then, the irradiating unit 82 irradiates the biological part 300 with light L2, and the tip of the linear part 24 is inserted into the biological part 300 (at a position closer to the blood vessel 302).

[0074] Then, the light L2 emitted by the irradiating unit 82 is scattered and transmitted through the biological tissue 304 (for example, skin tissue and muscle tissue) other than the blood vessels 302 of the biological part 300, and the transmitted light L2 (transmitted light) is received by the light receiving unit 84. At this time, hemoglobin in the blood flowing in the blood vessels 302 absorbs the light L2. Furthermore, the light L2 does not pass through the needle body 38.

[0075] Light L1 emitted by the light source unit 66 is guided through the optical path 26 (light guide hole 78, support unit 54, needle hub 40, catheter hub 30, and catheter shaft 28) and guided out from the tip 35 of the catheter shaft 28. Light L1 guided out from the tip 35 of the catheter shaft 28 is scattered and transmitted through biological tissue 304 (for example, skin tissue or muscle tissue) of the biological site 300, and the transmitted light L1 (transmitted light) is received by the light receiving unit 84.

[0076] 6, a received light image 90 created based on the light L1 and L2 received by the light receiving unit 84 is displayed on the image display unit 86. The received light image 90 displays, for example, biological tissue 304, blood vessels 302, and the tip of the linear portion 24.

[0077] Specifically, in the received light image 90, the tip 35 of the catheter shaft 28 (the portion from which light L1 is emitted) is displayed brightest (white), and the biological tissue is displayed darker than the tip of the catheter shaft 28. Furthermore, in the received light image 90, the blood vessel 302 and the needle 38 are displayed darker than the biological tissue. Note that when the needle 38 is not inserted into the blood vessel 302, the brightness of the needle 38 is equal to or greater than the brightness of the blood vessel 302. This allows the user to easily and clearly distinguish between the blood vessel 302 and the tip 35 of the catheter shaft 28 in the received light image 90.

[0078] 7, when the distal opening 46 of the needle body 38 is inserted into the blood vessel 302, blood in the blood vessel 302 is guided from the distal opening 46 of the needle body 38 through the lumen 42 of the needle body 38 into the blood inlet portion 62. At this time, air in the lumen 42 of the needle body 38 and the blood inlet portion 62 passes through the filter 56 and is discharged from an air vent hole (not shown) in the blood flow blocking portion 20. Therefore, the blood is smoothly guided into the blood inlet portion 62 of the needle hub 40. Then, by visually checking the blood guided into the blood inlet portion 62, the user can know that the distal opening 46 of the needle body 38 has been inserted into the blood vessel 302 (the blood vessel has been secured by the needle body 38).

[0079] At this time, the flow of blood in the blood inlet portion 62 in the proximal direction is blocked by the filter 56. Therefore, the blood in the blood inlet portion 62 does not come into contact with the light source unit 22.

[0080] Furthermore, when the distal end 35 of the catheter shaft 28 is inserted into the blood vessel 302, the light L1 emitted from the light source 66 is absorbed by hemoglobin in the blood. As a result, the light L1 does not reach the light receiving unit 84, or even if it does reach the light receiving unit 84, the intensity of the light is significantly reduced.

[0081] 8, the appearance of the tip 35 of the catheter shaft 28 changes in the received-light image 90 (the tip 35 of the catheter shaft 28 becomes darker). In other words, the brightness of the tip 35 of the catheter shaft 28 becomes equal to or lower than the brightness of the blood vessel 302. The brightness of the needle body 38 is equal to or higher than the brightness of the blood vessel 302. Therefore, the user can easily and quickly know from the received-light image 90 that the tip 35 of the catheter shaft 28 has been inserted into the blood vessel 302 (the catheter shaft 28 has secured the blood vessel).

[0082] Then, as shown in FIG. 9, the user removes the needle member 18 from the catheter member 16 while leaving the tip 35 of the catheter shaft 28 in the blood vessel 302, and administers a medicinal liquid into the blood vessel 302 through the lumen 32 of the catheter shaft 28.

[0083] 10, light source unit 22 is removed from blood flow blocking section 20. Light source unit 22 removed from blood flow blocking section 20 is reused. The used needle member 18 and blood flow blocking section 20 fixed to needle hub 40 are discarded together.

[0084] In this embodiment, when the light source unit 66 emits only visible light, the user can recognize the light L1 emitted from the distal end 35 of the catheter shaft 28 before the catheter shaft 28 has secured the blood vessel. On the other hand, when the catheter shaft 28 has secured the blood vessel, the light L1 is absorbed by hemoglobin in the blood, and the user cannot recognize the light L1 emitted from the distal end 35 of the catheter shaft 28. Therefore, even when the light source unit 66 emits only visible light, the user can easily and quickly determine whether the linear portion 24 has secured the blood vessel based on the light L1 emitted by the light source unit 66.

[0085] This embodiment has the following advantages.

[0086] According to this embodiment, the light source unit 22 is detachable from the attachment portion 64 of the blood flow blocking portion 20, so it is possible to select whether or not to use the light source unit 22 depending on the situation. Furthermore, when the light source unit 22 is used, the light L1 emitted by the light source portion 66 is guided to the tip portion 35 of the catheter shaft 28 via the optical path 26.

[0087] Before the catheter shaft 28 secures the blood vessel, the light L1 emitted from the distal end 35 of the catheter shaft 28 passes through the biological tissue 304 (subcutaneous tissue other than the blood vessel 302, etc.) and is guided to the outside of the biological site 300. On the other hand, after the catheter shaft 28 secures the blood vessel, the light L1 emitted from the distal end 35 of the catheter shaft 28 is absorbed by the blood and attenuated as it passes through the blood. In other words, the intensity of the light L1 that can be received or seen outside the biological site 300 changes before and after the catheter shaft 28 secures the blood vessel. Therefore, it is possible to easily and quickly determine whether the catheter shaft 28 (linear portion 24) has secured the blood vessel based on the light L1 emitted by the light source unit 66.

[0088] Furthermore, since blood flows into the blood inlet portion 62 when the needle body 38 secures a blood vessel, the user can accurately know whether the needle body 38 has secured a blood vessel by visually checking the blood flow into the blood inlet portion 62. At this time, the blood inlet portion 62 prevents blood from flowing from the blood inlet portion 62 to the attachment portion 64. Therefore, the light source unit 22 attached to the attachment portion 64 does not come into contact with blood. Therefore, the light source unit 22 can be reused.

[0089] When the light source unit 22 is attached to the attachment portion 64, the light source portion 66 emits light L1 toward the tip of the linear portion 24.

[0090] With this configuration, the light L1 emitted by the light source section 66 can be easily guided to the distal end of the linear section 24 (the distal end 35 of the catheter shaft 28).

[0091] The light source unit 22 has a housing 70 that houses the light source section 66 , and the housing 70 has a connecting section 76 that is detachable from the mounting section 64 .

[0092] With this configuration, the light source unit 66 can be protected by the housing 70.

[0093] The blood flow blocking portion 20 is fixed to the proximal end of the needle hub 40 .

[0094] With this configuration, blood leakage from between the needle hub 40 and the blood flow blocking portion 20 can be suppressed.

[0095] The blood flow blocking unit 20 includes a filter 56 that blocks the flow of blood from the blood inlet 62 to the attachment unit 64, and a support unit 54 that supports the filter 56. The attachment unit 64 is provided at the proximal end of the support unit 54.

[0096] With this configuration, the filter 56 can effectively suppress the flow of blood from the blood inlet portion 62 to the attachment portion 64.

[0097] The light source unit 66 emits light L1 that includes near-infrared light.

[0098] With this configuration, it is possible to effectively change the appearance of the light L1 emitted from the light source unit 66 and guided out from the distal end of the catheter shaft 28 before and after securing the blood vessel.

[0099] The optical path 26 is provided in the wall of the blood flow blocking portion 20, the wall of the needle hub 40, the wall of the catheter hub 30, and the wall of the catheter shaft 28. Light L1 emitted by the light source unit 66 is guided to the outside from the tip 35 of the catheter shaft 28.

[0100] With this configuration, it is possible to know whether the catheter shaft 28 is securing the blood vessel based on the light L1 emitted by the light source unit 66. Furthermore, with a simple configuration, the light L1 emitted by the light source unit 66 can be guided to the tip 35 of the catheter shaft 28.

[0101] A light transmission suppression section 80 that suppresses the transmission of light L1 emitted by the light source section 66 is provided on the outer peripheral surfaces of each of the wall sections of the blood flow prevention section 20, the needle hub 40, the catheter hub 30, and the catheter shaft 28.

[0102] With this configuration, the light L1 emitted by the light source unit 66 can be efficiently guided to the distal end 35 of the catheter shaft .

[0103] The vascular puncture system 10 includes a light receiving unit 84 that receives light L1 guided from the tip of the linear portion 24, and an image display unit 86 that displays a received light image 90 created based on the light L1 received by the light receiving unit 84.

[0104] With this configuration, it is possible to know whether the catheter shaft 28 has secured the blood vessel based on the received light image 90 displayed on the image display unit 86.

[0105] The blood vessel puncture device 12 may have a light source unit 22a shown in Figures 11A and 11B instead of the above-described light source unit 22. As shown in Figures 11A and 11B, the light source unit 22a includes a cover portion 100 provided on the housing main body 74. The cover portion 100 protrudes further in the distal direction than the distal end of the housing 70. The cover portion 100 is formed, for example, in a cylindrical shape.

[0106] The cover portion 100 is formed so as to block the light L1 emitted by the light source portion 66 from passing through it. Specifically, the cover portion 100 is made of an opaque material so as to block the light L1 emitted by the light source portion 66 from passing through it. However, the cover portion 100 may be made of a transparent material and formed by painting the surface with a light-opaque material such as carbon black. Alternatively, the cover portion 100 may be made of a transparent material and formed by depositing or coating a metal film on the surface. The cover portion 100 may be integrally molded with the housing main body 74, or may be formed as a separate member from the housing main body 74.

[0107] 11B , the cover 100 is provided on the housing main body 74 so as to externally cover the portion of the support part 54 that forms the optical path 26 when the light source unit 22a is attached to the blood flow blocking part 20. In this case, the light transmission suppression part 80 may not be provided on at least the portion of the optical path 26 of the support part 54 that is covered by the cover 100. The cover 100 may be provided on the housing main body 74 so as to externally cover the portion of the needle hub 40 that forms the optical path 26 when the light source unit 22a is attached to the blood flow blocking part 20.

[0108] The blood vessel puncture device 12 may have a light source unit 22b shown in Fig. 12 instead of the above-described light source unit 22. As shown in Fig. 12, the light source unit 22b includes a light source section 66, a power supply section 68, a housing 110, a light transmission section 112, and a connecting section 114. The housing 110 has an accommodation space 116 that accommodates the light source section 66. The power supply section 68 is provided in the housing 110.

[0109] The light transmitting unit 112 transmits the light L1 emitted by the light source unit 66. The light transmitting unit 112 is, for example, an optical fiber. One end of the light transmitting unit 112 is attached to the housing 110. The other end of the light transmitting unit 112 is provided with a connecting unit 114. The connecting unit 114 has a connecting unit 118 that is detachable from the mounting unit 64. The connecting unit 118 has a configuration similar to the connecting unit 76 described above.

[0110] With such light source unit 22b, for example, the needle member 18 and the catheter member 16 can be operated with the housing 110 and the power supply unit 68 placed on the floor or the like. This prevents the needle member 18 from becoming difficult to operate even if the light source unit 66 and the power supply unit 68 are made larger so that a sufficient amount of light L1 is guided to the tip end 35 of the catheter shaft 28 (the tip end of the linear portion 24).

[0111] (First Modification) Next, a blood vessel puncturing device 12A according to a first modified example will be described. In the blood vessel puncturing device 12A, the same components as those described above will be given the same reference numerals, and detailed description will be omitted. In the blood vessel puncturing device 12A, the same components as those of the blood vessel puncturing device 12 described above will have the same effects. The same applies to the blood vessel puncturing devices 12B to 12D according to second to fourth modified examples, which will be described later.

[0112] 13, a blood vessel puncture device 12A according to a first modification includes a catheter member 16, a needle member 18a, a blood flow blocking unit 20a, and a light source unit 22. The blood flow blocking unit 20a is detachable from the needle member 18a. That is, the second engagement portion 58 is detachably fitted to the first engagement portion 50.

[0113] The mating force (connection force) between first engaging portion 50 and second engaging portion 58 is formed to be greater than the mating force (connection force) between mounting portion 64 and connecting portion 76. In this case, when light source unit 22 is pulled in the proximal direction relative to needle hub 40, light source unit 22 can be removed from blood flow blocking portion 20a while keeping blood flow blocking portion 20a attached to needle hub 40.

[0114] The attachment structure of the needle hub 40 and the blood flow blocking portion 20a may be such that the first engagement portion 50 is a convex portion and the second engagement portion 58 is a concave portion (hole). Furthermore, the attachment structure is not limited to a fitting structure using convex and concave portions, but may also be a claw engagement structure, an attraction structure using a magnet, an engagement structure using a hook-and-loop fastener, a screw-threaded structure, etc.

[0115] The first engaging portion 50, the second engaging portion 58, the mounting portion 64, and the connecting portion 76 are preferably formed so that the direction of the force acting on the blood flow prevention portion 20a when separating the blood flow prevention portion 20a from the needle hub 40 is different from the direction of the force acting on the light source unit 22 when separating the light source unit 22 from the blood flow prevention portion 20a. That is, for example, if the first engaging portion 50 and the second engaging portion 58 have a fitting structure along the axial direction of the needle body 38, the mounting portion 64 and the connecting portion 76 are preferably formed into a screw-type structure. In such a case, the light source unit 22 can be easily removed from the blood flow prevention portion 20a while the blood flow prevention portion 20a remains attached to the needle hub 40.

[0116] The blood vessel puncture device 12A according to this modification can be used in the following manner: For example, as shown in Fig. 14A, before the blood vessel puncture device 12A is used, a filter cap 400 (blood flow blocking part) to which the light source unit 22 cannot be attached may be removably connected to the proximal end of the needle hub 40.

[0117] In such a case, the filter cap 400 is removed from the needle hub 40, and the blood flow blocking portion 20a with the light source unit 22 attached is attached to the needle hub 40, as shown in Figures 14B and 15A. Then, after securing the blood vessel at the tip of the linear portion 24 (needle body 38 and catheter shaft 28), the needle member 18a is removed from the catheter member 16, and the light source unit 22 is removed from the blood flow blocking portion 20a (see Figure 15B). The removed light source unit 22 is reused. The needle member 18a and the blood flow blocking portion 20a attached to the needle hub 40 are discarded together.

[0118] In this modification, the blood flow blocking portion 20 a is detachable from the proximal end of the needle hub 40 .

[0119] With this configuration, even if a filter cap 400 that cannot be attached to the light source unit 22 is removably connected to the base end of the needle hub 40, the filter cap 400 can be replaced with a blood flow blocking section 20a to which the light source unit 22 can be attached.

[0120] This modified example is not limited to the above-described configuration. Blood vessel puncture device 12A may include light source units 22a and 22b instead of light source unit 22.

[0121] (Second Modification) 16, a blood vessel puncture device 12B according to the second modification includes a catheter member 16, a needle member 18b, a blood flow blocking section 20, and a light source unit 22. The needle member 18b has a needle body 38a and a needle hub 40. The inner circumferential surface of the needle body 38a is coated with a reflecting section 130 (reflective film) for reflecting light L1 emitted by the light source section 66.

[0122] In the blood vessel puncture device 12B, light L1 emitted by the light source unit 66 is guided, in this order, through the light outlet hole 78, the filter 56, the blood flow path 60, the lumen 52 of the needle hub 40, and the lumen 42 of the needle body 38a. Light L1 introduced into the lumen 42 of the needle body 38a is guided toward the tip while reflecting off a reflector 130 provided on the inner surface of the needle body 38a, and is guided out through the tip opening 46 of the needle body 38a. In the blood vessel puncture device 12B, the light outlet hole 78, the filter 56, the blood flow path 60, the lumen 52 of the needle hub 40, and the lumen 42 of the needle body 38a form an optical path 134 that guides light L1 emitted by the light source unit 66 to the tip of the needle body 38a.

[0123] In this blood vessel puncture device 12B, when the light source 66 emits highly directional light L1 (for example, laser light), a large amount of light L1 can be guided out from the tip opening 46 of the needle 38a. As with the above-described blood vessel puncture device 12, the light L1 emitted by the light source 66 is also guided to the tip 35 of the catheter shaft 28. That is, in this modification, the light L1 emitted by the light source 66 is guided out from the tip opening 46 of the needle 38a and the tip 35 of the catheter shaft 28.

[0124] In the blood vessel puncture device 12B, in the received light image 90 before the linear portion 24 is secured in the blood vessel, the tip opening 46 of the needle body 38a and the tip portion 35 of the catheter shaft 28 are displayed brightest (white) (see FIG. 17).

[0125] Furthermore, in a state where the distal opening 46 of the needle body 38a is inserted into the blood vessel 302 but the distal end 35 of the catheter shaft 28 is not inserted into the blood vessel 302, the distal opening 46 of the needle body 38a appears dark, while the distal end 35 of the catheter shaft 28 appears bright (white) in the received light image 90 (see FIG. 6). Then, when the distal opening 46 of the needle body 38a and the distal end 35 of the catheter shaft 28 are inserted into the blood vessel 302, the distal end 35 of the catheter shaft 28 also appears dark in the received light image 90 (see FIG. 8).

[0126] In this modification, light L1 emitted by the light source unit 66 passes through the lumen 42 of the needle body 38a and is guided out from the distal end opening 46 of the needle body 38a.

[0127] With this configuration, it is possible to easily and quickly know whether the needle body 38a has secured the blood vessel based on the light L1 emitted by the light source section 66.

[0128] A reflecting portion 130 that reflects the light L1 emitted by the light source portion 66 is provided on the inner surface of the needle body 38a.

[0129] With this configuration, the light L1 emitted by the light source section 66 can be efficiently guided to the distal end opening 46 of the needle body 38a.

[0130] The blood vessel puncture device 12B according to this modification may have a blood flow blocking section 20b shown in FIG. 18 instead of the blood flow blocking section 20. The blood flow blocking section 20b includes a support section 140 and a filter 142. The support section 140 has a plurality of blood flow paths 144. These blood flow paths 144 are located on the outer periphery of the support section 140. In other words, a central section 146 of the support section 140 is closed by a wall section. The central section 146 of the support section 140 is transparent so that light L1 emitted by the light source section 66 can pass through.

[0131] Each blood flow path 144 extends from the distal end surface of the support part 140 (the distal end surface of the second engagement part 58) to the proximal end surface of the support part 140. The multiple blood flow paths 144 are arranged at intervals in the circumferential direction of the support part 140. The filter 142 is fixed to the proximal end surface of the support part 140 so as to cover the proximal end openings of the multiple blood flow paths 144. The filter 142 extends in an annular (e.g., circular) shape. The lumen 52 of the needle hub 40 and the multiple blood flow paths 144 form a blood inlet part 148 for checking flashback.

[0132] In such a blood flow blocking section 20b, light L1 emitted by the light source section 66 passes through the center section 146 of the support section 140 (without passing through the filter 142) and is guided to the lumen 52 of the needle hub 40. In this case, the material of the filter 142 is not limited to one that transmits light L1, making it easy to select the material of the filter 142.

[0133] This modified example is not limited to the configuration described above. Blood vessel puncturing device 12B may include light source units 22a and 22b instead of light source unit 22. In blood vessel puncturing device 12B, blood flow blocking unit 20 may be detachable from the proximal end of needle hub 40.

[0134] (Third Modification) 19, a blood vessel puncture device 12C according to the third modification includes a catheter member 16, a needle member 18c, a blood flow blocking portion 20c, a light source unit 22, and a light guiding member 150. The needle member 18c includes a needle body 38 and a needle hub 40a.

[0135] The needle hub 40a has a needle connection hole 48, a lumen 52, a blood inlet 152 for checking flashback, a first engagement portion 50, and a filter 154. A guide surface 132 for guiding the light guiding member 150 into the lumen 42 of the needle body 38 is provided on the inner circumferential surface of the needle hub 40a. The guide surface 132 tapers in diameter toward the needle body 38 (distal end). The base end of the needle body 38 is located further distally than the base end of the needle connection hole 48. The lumen 52 of the needle hub 40a communicates with the base end of the needle connection hole 48. The blood inlet 152 includes a first opening 156 that opens into the inner circumferential surface of the needle connection hole 48 and a second opening 158 that opens into the proximal end surface of the needle hub 40a.

[0136] The first opening 156 is located in the proximal direction relative to the proximal end of the needle body 38. The second opening 158 is covered by a filter 154 fixed to the proximal surface of the needle hub 40a. The filter 154 allows air to pass through while blocking blood from passing through.

[0137] The blood flow blocking unit 20c includes a support portion 160. The support portion 160 has a second engagement portion 58, an attachment portion 64, and an insertion hole 162. The second engagement portion 58 fits into the first engagement portion 50 in a liquid-tight and airtight manner. The light-guiding member 150 is inserted into the insertion hole 162. The insertion hole 162 extends from the distal end surface of the support portion 160 (the distal end surface of the second engagement portion 58) to the attachment portion 64. The insertion hole 162 is located on an extension of the axis of the needle body 38. The blood flow blocking unit 20c is detachable from the proximal end of the needle hub 40a.

[0138] The light-guiding member 150 extends linearly along the axial direction of the needle body 38. The light-guiding member 150 is located on the axis of the needle body 38. The light-guiding member 150 is inserted into the inner cavity 42 of the needle body 38. The tip of the light-guiding member 150 is located near the tip opening 46 of the needle body 38.

[0139] The distal end surface of the light-guiding member 150 faces the distal end opening 46 of the needle body 38. The outer diameter of the light-guiding member 150 is smaller than the inner diameter of the needle body 38. In other words, a flow path 168 for guiding blood toward the proximal end is formed between the outer peripheral surface of the light-guiding member 150 and the inner peripheral surface of the needle body 38. The flow path 168 extends from the distal end of the light-guiding member 150 to the proximal end of the needle body 38.

[0140] A base end portion of the light guiding member 150 is supported by the support portion 160. The base end portion of the light guiding member 150 is fixed to the support portion 160 in a state where it is inserted into the insertion hole 162. However, the light guiding member 150 may be detachable from the support portion 160.

[0141] The base end surface of the light-guiding member 150 faces the light-guiding hole 78 when the light source unit 22 is attached to the attachment portion 64. The light-guiding member 150 is provided continuously from the tip of the needle body 38 to the blood flow blocking portion 20c. The light-guiding member 150 may be provided discontinuously from the tip of the needle body 38 to the blood flow blocking portion 20c. The light-guiding member 150 is formed as a solid body. Examples of the light-guiding member 150 include an optical fiber, an acrylic rod, a glass rod, and a light-emitting tube.

[0142] The area of ​​the first opening 156 of the blood inlet 152 is larger than the cross-sectional area of ​​the annular flow path formed between the outer peripheral surface of the light guiding member 150 and the inner peripheral surface of the needle connection hole 48 in the proximal direction from the first opening 156 in the needle connection hole 48. Therefore, blood guided from the lumen 42 of the needle body 38 to the needle connection hole 48 flows preferentially into the blood inlet 152. In other words, blood can be effectively prevented from flowing into the lumen 52 of the needle hub 40a.

[0143] In the blood vessel puncture device 12C, the above-described filter cap 400 (see FIG. 14A) is removed from the proximal end of the needle hub 40a, and the blood flow blocking unit 20c to which the light guiding member 150 is attached is attached to the proximal end of the needle hub 40a. At this time, when the blood flow blocking unit 20c is attached to the needle hub 40a, the light guiding member 150 is inserted into the lumen 42 of the needle body 38 while being guided by the guide surface 132. Note that in the blood vessel puncture device 12C, the light guiding member 150 may be inserted alone into the lumen 42 of the needle body 38, and then the light guiding member 150 may be adhered (attached) to the blood flow blocking unit 20c.

[0144] In the blood vessel puncture device 12C, light L1 emitted by the light source unit 66 is guided to the tip opening 46 of the needle body 38 via the light guide hole 78 and the light guide member 150. In the blood vessel puncture device 12C, the light guide hole 78 and the light guide member 150 form an optical path 170 that guides the light L1 emitted by the light source unit 66 to the tip of the needle body 38.

[0145] In this blood vessel puncture device 12C, when the light source unit 66 emits highly directional light L1 (for example, laser light), a large amount of light L1 can be guided from the tip opening 46 of the needle body 38. As with the above-described blood vessel puncture device 12, the light L1 emitted by the light source unit 66 is also guided to the tip 35 of the catheter shaft 28. That is, in this modification, the light L1 emitted by the light source unit 66 is guided from the tip opening 46 of the needle body 38 and the tip 35 of the catheter shaft 28. However, the light L1 does not have to be guided from the tip 35 of the catheter shaft 28.

[0146] In the blood vessel puncture device 12C, the appearance of the received light image 90 is the same as in the blood vessel puncture device 12B according to the second modification, and therefore a description thereof will be omitted.

[0147] The optical path 170 includes a light guide member 150 for guiding the light L1 from the light source unit 22 to the tip of the needle body .

[0148] With this configuration, the light L1 emitted by the light source unit 66 can be guided out from the distal end opening 46 of the needle body 38.

[0149] The tip of the light guide member 150 is positioned at the tip of the needle body 38 when inserted into the lumen 42 of the needle body 38 .

[0150] With this configuration, the light L1 emitted by the light source unit 66 can be efficiently guided to the distal end opening 46 of the needle body 38.

[0151] The proximal end of the light guide member 150 is supported by the blood flow blocking portion 20c.

[0152] According to this configuration, the positional deviation of the proximal end of the light-guiding member 150 relative to the blood flow blocking portion 20c is suppressed, so that the light L1 emitted by the light source portion 66 can be efficiently guided into the light-guiding member 150.

[0153] The blood flow blocking unit 20c is detachably attached to the proximal end of the needle hub 40a. A guide surface 132 is provided on the inner surface of the needle hub 40a to guide the light guiding member 150 into the lumen 42 of the needle body 38 when the blood flow blocking unit 20c is attached to the proximal end of the needle hub 40a. The guide surface 132 tapers in diameter toward the needle body 38.

[0154] With this configuration, when the blood flow blocking portion 20c is attached to the proximal end of the needle hub 40a, the guide surface 132 allows the light guiding member 150 to be smoothly inserted into the lumen 42 of the needle body 38.

[0155] This modified example is not limited to the configuration described above. Blood vessel puncturing device 12C may include light source units 22a and 22b instead of light source unit 22. In blood vessel puncturing device 12C, blood flow blocking unit 20c may be fixed to the proximal end of needle hub 40a.

[0156] (Fourth Modification) 20, a blood vessel puncture device 12D according to the fourth modification includes a catheter member 16, a needle member 18d, a blood flow blocking unit 20d, a light source unit 22, and a light guiding member 150a. The blood flow blocking unit 20d includes a support member 180 and a filter 56.

[0157] The needle member 18d has a needle body 38 and a needle hub 40b. The guide surface 132 described above is provided on the inner peripheral surface of the needle hub 40b.

[0158] The support part 180 has a second engagement part 58, an attachment part 64, an insertion hole 182, and a blood inlet part 184 for checking flashback. The light guiding member 150a is inserted into the insertion hole 182. The insertion hole 182 opens to the distal end surface of the support part 180 (the distal end surface of the second engagement part 58). That is, the insertion hole 182 communicates with the lumen 52 of the needle hub 40b. The blood inlet part 184 communicates with the proximal end of the insertion hole 182. The filter 56 is supported by the support part 180 so as to prevent blood in the blood inlet part 184 from flowing to the attachment part 64.

[0159] The light-guiding member 150a is formed in a tubular shape. The light-guiding member 150a is made of acrylic, glass, a light-emitting tube, or the like. The light-guiding member 150a extends linearly along the axial direction of the needle body 38. The light-guiding member 150a is located on the axis of the needle body 38. The light-guiding member 150a is inserted into the inner cavity 42 of the needle body 38. The tip of the light-guiding member 150a is located near the tip opening 46 of the needle body 38. The tip surface of the light-guiding member 150a faces the tip opening 46 of the needle body 38. The outer peripheral surface of the light-guiding member 150a is in liquid-tight contact with the inner peripheral surface of the needle body 38. However, the outer peripheral surface of the light-guiding member 150a may be spaced from the inner peripheral surface of the needle body 38.

[0160] The proximal end of light-guiding member 150a is supported by support portion 180. The proximal end of light-guiding member 150a is fixed to support portion 180 while being inserted into insertion hole 182. However, light-guiding member 150a may be detachable from support portion 180. The proximal end surface of light-guiding member 150a is positioned on the optical axis of light source unit 66. The proximal end of lumen 151 of light-guiding member 150a communicates with blood inlet portion 184.

[0161] In the blood vessel puncture device 12D, the above-described filter cap 400 (see FIG. 14A) is removed from the proximal end of the needle hub 40b, and the blood flow blocking unit 20d to which the light guiding member 150a is attached is attached to the proximal end of the needle hub 40b. At this time, the light guiding member 150a is inserted into the lumen 42 of the needle 38 while being guided by the guide surface 132. Note that in the blood vessel puncture device 12D, the light guiding member 150a may be inserted alone into the lumen 42 of the needle 38, and then the light guiding member 150a may be adhered (attached) to the blood flow blocking unit 20d.

[0162] In the blood vessel puncture device 12D, light L1 emitted by the light source unit 66 is guided to the tip opening 46 of the needle body 38 via the light guide hole 78, the filter 56, the blood inlet portion 184, and the light guide member 150a. In the blood vessel puncture device 12D, the light guide hole 78, the filter 56, the blood inlet portion 184, and the light guide member 150a form an optical path 186 that guides the light L1 emitted by the light source unit 66 to the tip portion of the needle body 38.

[0163] In this blood vessel puncture device 12D, when the light source unit 66 emits highly directional light L1 (for example, laser light), a large amount of light L1 can be guided out from the tip opening 46 of the needle body 38. As with the above-described blood vessel puncture device 12, the light L1 emitted by the light source unit 66 is also guided to the tip portion 35 of the catheter shaft 28. That is, in this modification, the light L1 emitted by the light source unit 66 is guided out from the tip opening 46 of the needle body 38 and the tip portion 35 of the catheter shaft 28.

[0164] In blood vessel puncturing device 12D, the appearance of received light image 90 is similar to that of blood vessel puncturing device 12B according to the second modification, and therefore a description thereof will be omitted. In blood vessel puncturing device 12D according to this modification, the same configuration as that of blood vessel puncturing device 12C described above provides the same effects.

[0165] This modified example is not limited to the configuration described above. Blood vessel puncturing device 12D may include light source units 22a and 22b instead of light source unit 22. In blood vessel puncturing device 12D, blood flow blocking unit 20d may be fixed to the proximal end of needle hub 40b.

[0166] The present invention is not limited to the above disclosure, and various configurations can be adopted without departing from the gist of the present invention. [Explanation of symbols]

[0167] 10... Vascular puncture system 12, 12A to 12D... Vascular puncture device 20, 20a to 20d...blood flow blocking portion 22, 22a, 22b...light source unit 24... Linear part 26, 134, 170, 186... Optical path 28...catheter shaft 30...catheter hub 38, 38a... needle body 40, 40a, 40b... needle hub 54, 140, 160, 180...Support part 62, 148, 184...Blood inflow part 64...Attachment part 66...Light source part 70, 110...Housing 76, 118...Connection 80...Light transmission suppressing section 84...Light receiving section 86...Image display unit 90...Received light image 130...reflecting portion 132...guiding surface 150, 150a...light guide member 300...biological part 302...Vessel

Claims

1. A blood vessel puncture device comprising a linear portion capable of puncturing a blood vessel at a living body site, the linear portion including a tubular needle body, and a needle hub provided at a base end of the needle body, a blood flow blocking portion provided at the base end of the needle hub; a light source unit having a light source section that emits light and that is detachable from the attachment section of the blood flow blocking section; an optical path that guides the light emitted by the light source unit to a tip end of the linear portion, the light emitted by the light source unit is guided to the outside from the tip end of the linear portion, At least one of the needle hub and the blood flow blocking portion is provided with a blood inlet portion for checking flashback, into which blood flowing in from the tip opening of the needle body is guided, A blood vessel puncture device, wherein the blood flow blocking portion is formed to block the blood in the blood inlet portion from flowing to the attachment portion.

2. The vascular puncture device according to claim 1, A blood vessel puncture device, wherein when the light source unit is attached to the attachment portion, the light source portion emits the light toward the tip of the linear portion.

3. The vascular puncture device according to claim 1, the light source unit has a housing that accommodates the light source portion, A blood vessel puncture device, wherein the housing has a connection portion that is detachable from the mounting portion.

4. The vascular puncture device according to claim 1, A blood vessel puncture device, wherein the blood flow blocking portion is fixed to the base end portion of the needle hub.

5. The vascular puncture device according to claim 1, A blood vessel puncture device, wherein the blood flow blocking portion is detachable from the base end portion of the needle hub.

6. The vascular puncture device according to claim 1, A blood vessel puncture device, wherein the light emitted by the light source unit is guided through an inner cavity of the needle body and out of the tip opening of the needle body.

7. 7. The vascular puncture device according to claim 6, A blood vessel puncture device, wherein the inner surface of the needle body is provided with a reflecting portion that reflects the light emitted by the light source portion.

8. 7. The vascular puncture device according to claim 6, The optical path includes a light guiding member for guiding the light emitted by the light source unit to the tip of the needle body.

9. 9. The vascular puncture device according to claim 8, A blood vessel puncture device, wherein the tip of the light-guiding member is positioned at the tip of the needle body when inserted into the lumen of the needle body.

10. 9. The vascular puncture device according to claim 8, A blood vessel puncture device, wherein the proximal end of the light guiding member is supported by the blood flow blocking portion.

11. The vascular puncture device of claim 10, the blood flow blocking portion is detachable from the base end portion of the needle hub; a guide surface is provided on the inner surface of the needle hub for guiding the light guiding member into the lumen of the needle body when the blood flow blocking unit is attached to the base end of the needle hub; A blood vessel puncture device, wherein the guide surface tapers toward the needle body.

12. The vascular puncture device according to claim 1, The blood flow blocking portion is a filter that blocks the blood from flowing from the blood inlet to the attachment portion; a support portion that supports the filter, A blood vessel puncture device, wherein the attachment portion is provided at the base end of the support portion.

13. The vascular puncture device according to claim 1, The light source unit emits light including near-infrared light.

14. The vascular puncture device according to claim 1, a tubular catheter shaft having a lumen through which the needle body is inserted; a catheter hub provided at a base end of the catheter shaft and having a lumen through which the needle body is inserted; The linear portion includes the needle body and the catheter shaft.

15. 15. The vascular puncture device of claim 14, the optical path is provided in a wall portion of the blood flow blocking portion, a wall portion of the needle hub, a wall portion of the catheter hub, and a wall portion of the catheter shaft; A blood vessel puncture device, wherein the light emitted by the light source unit is guided to the outside from the tip of the catheter shaft.

16. 16. The vascular puncture device of claim 15, a blood vessel puncture device, wherein a light transmission suppression portion that suppresses the transmission of the light emitted by the light source portion is provided on the outer peripheral surface of each of the wall portion of the blood flow prevention portion, the wall portion of the needle hub, the wall portion of the catheter hub, and the wall portion of the catheter shaft.

17. The blood vessel puncture device according to any one of claims 1 to 16, a light receiving portion that receives the light guided from the tip end of the linear portion; an image display unit that displays a received light image created based on the light received by the light receiving unit.

Images